Linked Life Data

10393806

Source:http://linkedlifedata.com/resource/pubmed/id/10393806

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pubmed-article:10393806pubmed:dateCreated1999-10-14lld:pubmed
pubmed-article:10393806pubmed:abstractTextThe distribution of Ole e I (the major olive pollen allergen) and its transcripts was investigated in the anther from premeiotic stages until the dehiscent pollen stage. Crude protein extracts were analyzed by immunoblotting and probed with a monoclonal antibody to Ole e I. The protein, with three variants, was found to accumulate from the early microspore stage onwards. In addition to the previously reported localization of the protein, Ole e I has been immunolocalized for the first time within the pollen wall and in the tapetum. Reverse transcription-polymerase chain reaction analysis using specific oligonucleotides and RNA extracted from whole anthers revealed that the Ole e I gene is expressed from the late tetrad stage onwards. No expression was found in control tissues such as petals, roots or leaves. Light microscopy in situ hybridization on developing flower buds and dehiscent pollen confirmed the transcripts to be present in both the microspores and the sporophytic tissue (tapetum). Labeling was found primarily in the tapetum, reaching the highest concentration in the cytoplasm of the developing and mature pollen, once tapetum started to degenerate. In situ hybridization at the transmission electron microscope level showed the transcripts to accumulate on ribosomes of the rough endoplasmic reticulum. These studies, together with others carried out previously by us, indicated that both synthesis and storage of Ole e I take place in the endoplasmic reticulum, coincidentally with the conspicuous changes suffered by this membrane system during pollen development. This process is most likely controlled at the transcriptional level. The localization of the protein in the pollen ectexine bring new insights into the function of the allergen, which are discussed.lld:pubmed
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pubmed-article:10393806pubmed:authorpubmed-author:RodríguezRRlld:pubmed
pubmed-article:10393806pubmed:authorpubmed-author:FernándezM...lld:pubmed
pubmed-article:10393806pubmed:authorpubmed-author:CastroA JAJlld:pubmed
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pubmed-article:10393806pubmed:authorpubmed-author:de Dios...lld:pubmed
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pubmed-article:10393806pubmed:volume112 ( Pt 15)lld:pubmed
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pubmed-article:10393806pubmed:pagination2501-9lld:pubmed
pubmed-article:10393806pubmed:dateRevised2006-11-15lld:pubmed
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pubmed-article:10393806pubmed:year1999lld:pubmed
pubmed-article:10393806pubmed:articleTitleThe major olive pollen allergen (Ole e I) shows both gametophytic and sporophytic expression during anther development, and its synthesis and storage takes place in the RER.lld:pubmed
pubmed-article:10393806pubmed:affiliationEstación Experimental del Zaidín, CSIC, Profesor Albareda 1, E-18008 Granada, Spain.lld:pubmed
pubmed-article:10393806pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:10393806pubmed:publicationTypeResearch Support, Non-U.S. Gov'tlld:pubmed
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